Manuel Amaya, a cousin of Luna's, said the teen experienced learning difficulties in his youth and was a sweet, quiet boy who mostly stayed at home and kept to himself.

“He was a very naive kid," Amaya said. "He was big for his age, but he was just a gentle giant.”

Luna was the youngest of eight children and took special needs classes as a sophomore at Buena Vista High School, family members said. A GoFundMe page set up to raise money for his funeral expenses said he had just turned 16 seven days before he was killed.

A memorial at the site was growing Tuesday afternoon as loved ones brought flowers and candles to the site of the teen's death.

A man who lives in the neighborhood told KTLA a lot of kids live in the area and he isn’t aware of a gang problem. “I’m surprised,” the man said about the shooting.

Authorities are searching for the two suspects but do not have a description.